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  1. Calcite
  2. CALCITE-2755

expose document _id field when querying ElasticSearch

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      Description

      Elastic exposes _id field for each document (think unique doc ID).

      Expose if it is explicitly listed in projection: 

      select _MAP['_id'], _MAP['foo'] from elastic -- available
      select * from elastic -- not available
      

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              • Assignee:
                julianhyde Julian Hyde
                Reporter:
                sereda Andrei Sereda
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